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US 2011/0226313 A1Published application
High temperature acrylic sheet
AssigneeArkema France
InventorsAmy A. Lefebvre, Jiaxin Jason Ge, Michael T. Burchill, Florence Mehlmann
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Abstract
The invention relates to an acrylic sheet having a high Tg, and especially for the use of the high Tg acrylic sheet as a front sheet of a photovoltaic module. The high Tg acrylic polymer is a copolymer of polymethylmethacrylate and one or more higher Tg monomers.
Claims12
A photovoltaic (PV) module comprising:
- a) a front acrylic glazing material having a Tg of 110° C. or greater, as measured by differential scanning calorimetry (DSC), comprising a polymer having at least 50 weight percent of methylmethacrylate units and at least 1 weight percent of high Tg monomer units having a Tg (of the homopolymer of the monomer) of greater than 120° C., wherein if said polymer is a copolymer of with only one high Tg monomer it comprises no acrylamide or methacrylamide;
- and if said copolymer comprises more than one high Tg monomer, the polymer may contain 0 to 3 weight percent of acrylamide or methacrylamide units as one of the high Tg monomer;
- b) an interior layer capable of converting solar radiation into electricity;
- and
- c) a back layer.
2 more elements
Dependencies are inferred from the claim text.